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2. IMPORTANT OVERVIEW
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2-4. Audio Signals
Dolby Digital Sound with 5.1 Channels
sub-woofer
right
speaker
left
speaker
surround
sound
speaker
surround
sound
speaker
Digital Audio Signals
The Zenith HD Satellite Receiver will be the focal center of your home entertainment system com-
prising a variety of components, such as TV, DVD, VCR, etc. and external audio systems. Since digital
programs being broadcast contain digital-quality audio, you can create a home theater by sending
audio signals from the HD satellite receiver to your audio system externally. HD digital signals use the
Dolby Digital audio encoding system - the same digital sound used in most movie theaters, on DVDs,
and in many home theater systems.
When you tune to a channel, the Zenith HD Satellite Receiver can send signals either to a Dolby
Digital decoder/receiver or to a PCM (normal digital) decoder. (* Refer to Section 3.7 Connection
for Audio for making the required external connections to your system.)
Using the analog mode of the Zenith HD Satellite Receiver allows use of your Hi-Fi audio system
instead of the TV speakers. This usually results in substantially improved sound.
Dolby Digital, formally known as AC-3 for Audio Coding 3rd Generation or
“5.1” channel audio, is a coding technique that provides five independent,
full frequency response audio channels (three in left, center, and right, two
in rear left and right, and one low frequency effect for a sound you can
feel).
Pulse Code Modulation (PCM) decoders support L/R stereo only. If select-
ed, audio outputs are decoded and transmitted in PCM mode.
GLOSSARY